CN108884596B

CN108884596B - Device for melt spinning, drawing off and winding up a thread web

Info

Publication number: CN108884596B
Application number: CN201780019196.0A
Authority: CN
Inventors: M·费希尔; J·赫根巴特; M-A·赫尔恩多夫; L·沃客夫斯基
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2016-03-24
Filing date: 2017-03-14
Publication date: 2021-07-06
Anticipated expiration: 2037-03-14
Also published as: US20200291547A1; CN108884596A; EP3433400B1; US11162194B2; EP3433400A1; WO2017162470A1

Abstract

The invention relates to a device for melt spinning, drawing off and winding up a thread web, comprising a spinning device. The spinning device has an array of several spinning nozzles, wherein the threads produced by the spinning nozzles are drawn off by a godet unit having several drivable godets. The device is provided with a winding device having a row of several winding stations, wherein the row of winding stations is arranged perpendicularly to the row of spinning nozzles. The different thread spacings in the spinning device and the thread guide disk device are compensated by the thread deflection device. For this purpose, the thread deflection device has a first group of thread guides and a second group of thread guides. The first group of yarn guides are arranged side by side in a horizontal row at a spinning pitch. The aim of the invention is to obtain maximum deflection at low heights. According to the invention, this is achieved in that the thread guides of the two thread guides are formed by freely rotatable rollers.

Description

Device for melt spinning, drawing off and winding up a thread web

Technical Field

The invention relates to a device for melt spinning, drawing off and winding up a thread web.

Background

WO2004/015173 discloses a device for melt spinning, drawing off and winding up a thread web according to the preamble.

For producing synthetic threads, it is known to spin, draw and wind thread pieces of a plurality of threads in parallel into bobbins in a spinning position. For this purpose, in particular, the device known from WO2004/015173 is used. The device according to the preamble has a spinning device for this purpose, which has a row of several spinning nozzles. Below the spinning device, a godet device with at least two drivable godets and a winding device with a plurality of winding stations are provided. In this case, the godet unit is directly associated with the winding device, wherein the godet is oriented substantially transversely to the spinning spindle of the winding device. A plurality of winding stations extend along the spinning spindle, the arrangement of the winding stations being maintained substantially perpendicular to the arrangement of the spinning nozzles of the spinning device. By arranging the guide wire disc device and the winding device in this way, a very compact embodiment can be achieved.

In the production of threads, it is now necessary for the threads to be guided in the thread web from melt spinning to winding at different thread spacings. In order to compensate in particular for the transition between guidance at large thread spacings and guidance at small thread spacings, thread deflection devices are used. The known device therefore has a thread deflection device between the spinning device and the thread guide device, which is formed by two sets of thread guides. A first group of thread guides is associated with the spinning device in order to guide the threads according to the spinning pitch. The second group of thread guides is associated with the thread guide device for picking up thread pieces, so that the threads can be guided over the circumference of the thread guide device at a much smaller thread spacing. However, it should be noted here that the deflection of the thread, in particular on the outer thread, does not lead to an undesirable change in the thread tension and thus in the physical properties of the thread. Therefore, all the threads of the thread sheet have the same physical properties after production, independently of the number of threads, on the basis of the precondition. In this connection, in the known device, the number of spinning nozzles arranged in an array is substantially limited by the permissible deflection angle at the thread.

Disclosure of Invention

The object of the invention is therefore to improve the device for melt spinning, drawing off and winding up a thread web according to the preamble in such a way that a uniform consistency as high as possible is achieved in the production of the thread, irrespective of the number of spinning nozzles which are held in an arrangement and irrespective of the maximum deflection angle.

According to the invention, this task is achieved in that the thread guides of the two thread guides are formed by freely rotatable rollers.

The invention is characterized in that the threads of the thread sheet are guided essentially frictionless during the transition from the spinning device to the godet device. In this case it has been unexpectedly demonstrated that the angle of wrap on the roll, which is substantially proportional to the angle of deflection, does not cause a change in the physical properties. The thread can thus be guided substantially without slip without a large friction effect on the circumferential surface of the counter roll,

in order to be able to guide the thread pieces together with the smallest possible thread spacing on the circumference of the godet unit, the development of the invention is preferably designed such that the rollers of the second group of godets are arranged in a staggered manner above and/or below one another. Thus, a thread spacing between threads that is smaller than the diameter of the roller can be achieved. Typical thread spacings for guiding the threads on the godet are in the range of 4-8 mm. Even a small thread spacing between the threads of the thread sheet can be achieved by the offset arrangement of the rollers above or below one another.

In this case, the horizontal offset between the rollers of the second group of guides is preferably equal to the thread spacing, so that the thread can be guided on the circumference of the godet immediately after leaving the rollers.

In order to achieve a compact arrangement of the rollers, it is also provided that the rollers of the second group of thread guides are held in an inverted V-shaped train in the central region below the spinning device. The outer threads of the spinning device can thus be drawn off from the spinning device and fed to the godet device under the same conditions.

For the purpose of guiding the threads between the spinning device and the thread guide device and between the thread guide device and the winding device, it has also proved to be extremely advantageous if the axes of the rollers of the two groups of thread guides and the axis of the thread guide disk are oriented perpendicularly to one another. For this purpose, it is possible to guide the threads between the spinning devices essentially without friction up to the winding station of the winding device.

The development of the invention in which the spinning nozzles of the spinning device are held by two spinning beams arranged next to one another and the rollers of the second group of thread guides are held in the central region between the spinning beams is particularly suitable for simultaneously drawing off a plurality of thread webs from adjacent spinning stations and winding them into bobbins. Embodiments of the present invention are particularly suited to modernizing existing melt spinning apparatus. Thus, existing spinning devices can be combined with new winding systems.

For the convenience of operation, the following development of the invention is provided, in which the rollers of the second group of thread guides are held on one or two movable carriers, which can each be guided between a roller placement position and a roller travel position. The roller can thus be held in such a way that an artificial thread guidance by means of a suction gun can be achieved for the thread to be placed independently of the offset.

The support element can therefore preferably be held at one end of the axis of rotation and guided in an angular range up to the horizontal. For this purpose, the maximum spacing between the rollers is available for the thread to abut against the rollers.

In order to achieve as compact a thread guidance as possible, in particular in the region of the godet unit and the winding unit, it is also provided that the godet unit and the winding unit are arranged in a central region below the spinning device and that the godet unit is held at a front end of the winding unit. Whereby the filament sheets can be fed from a substantially horizontal plane to a separate winding station.

In particular, the development of the invention proves to be such that the godet unit has a thread suction device, which is arranged downstream of the rollers of the second group of godets in the direction of the thread, when the operation is interrupted by incorrect behavior in the winding device. In the event of a fault, the thread sheet is therefore cut in the region below the thread deflection device. For this purpose, the thread itself is guided over the roller circumference in the event of a fault. Subsequent re-placement is only required in the guidewire disc device and the winding device. A short interruption time will be achieved.

Drawings

The invention will be described in detail below with reference to several embodiments and with reference to the attached drawings, in which:

figure 1 schematically shows a front view of a first embodiment of the device according to the invention,

figure 2 schematically shows a side view of the embodiment of figure 1,

figure 3 schematically shows a front view of another embodiment of the device according to the invention,

fig. 4 schematically shows a front view of another embodiment of the device according to the invention.

Detailed Description

Fig. 1 and 2 show a first embodiment of a device according to the invention for melt spinning, drawing off and winding up a thread web in several views. Fig. 1 shows this embodiment in a front view and fig. 2 in a side view. The following description applies to both figures as long as no figure is explicitly mentioned therein.

This embodiment has a spinning device 1, a thread deflection device 12, a godet device 16 and a winding device 21 arranged below one another.

The spinning device 1 has a plurality of spinning nozzles 3 for spinning multifilament yarns, and they are held in series at intervals on the bottom surface of the spinning beam 2. The spinning beam 2 is designed to be heatable for temperature control of the spinning nozzle 3. A melt distribution system 6 is formed in the spinning beam 2, which is connected to the spinning pump 4. The spinning pump 4 is designed as a multi-channel pump in order to generate one partial melt stream for each spinning nozzle 3. For this purpose, the spinning pump 4 is driven by a pump drive 4.1.

Via an inlet 5, the spinning pump 4 is connected to a melt source, not shown here, such as an extruder or a discharge pump.

A cooling device 7 is provided below the spinning beam 2, and a cooling shaft 9 is formed below the spinning beam 2 to guide and cool the freshly extruded filament strand.

As shown in the illustration in fig. 2, a blower chamber 10 is associated with the cooling shaft 9 on one side and is connected to the cooling shaft 9 via a blower wall 11.

It is explicitly stated here that the illustrated cooling device with transversely oriented cooling air flows is exemplary. In principle, such a cooling device can also have a device which blows cooling air streams generated radially from the inside to the outside or radially from the outside to the inside onto the thread.

The freshly extruded thread forms a thread disk 30 which is drawn off from the spinning device 1 by the thread disk device 16. The godet unit 16 in this exemplary embodiment has two driven godets 18.1,18.2, which are held with their godet housings in a cantilevered manner on a godet carrier 17. The drive associated with the godet 18.1,18.2 is held on the rear side of the godet carrier 17.

A suction device 19 is provided in the inlet region upstream of the first godet 18.1. The suction device 19 has at least one movable thread guide, a knife and a suction nozzle, which are not shown in detail here. Such suction devices 19 are known for a long time and are therefore not further described here.

Between the godets 18.1,18.2, a swirling device 20 is held on the godet carrier 17, whereby the individual threads of the thread sheet 30 are swirled.

The godet carrier 17 is arranged directly on an end face of the winding device 21, so that the threads from the godets 18.2 are distributed from a substantially horizontal distribution plane to a plurality of winding stations 26. The godet carrier 17 is here supported directly on the frame 22 of the winding device 21.

The winding stations 26 formed in the winding device 21 are designed to be identical and extend along the spinning spindle 23.1. The arrangement of the winding stations 26 and thus the spinning spindles is arranged substantially perpendicular to the arrangement of the spinning nozzles 3 of the spinning device 1. For this purpose, a very compact arrangement of the godet unit 16 and the winding unit 21 can be achieved.

The spinning spindles 23.1 are arranged on a rotatably mounted winding turret 28, wherein the winding turret 28 is provided with second spinning spindles 23.2 arranged offset by 180 °. In this connection, the spinning spindles 23.1, 23.2 can alternately enter the winding region and the exchange region. In the winding region, the spinning spindles 23.1, 23.2 cooperate with the respective winding station 26 in order to form a bobbin 29 on the circumference of the spinning spindle 23.1 or 23.2 at each winding station 26.

The winding stations 26 have the same structure and have deflection rollers 24 and traversing units 25, respectively. The separation of the threads takes place by means of deflection rollers 24, which are then guided back and forth by means of a traversing unit 25. In order to place the thread on the circumference of the bobbin 29, a pressure roller 27 is provided which extends over all the winding stations 26.

In order to collect the thread pieces in the region between the spinning device 1 and the godet device 16, a thread deflection device 12 is provided. The thread deflection device 12 in this exemplary embodiment has a first group of thread guides 13, which are formed by rollers 13.1 that are each freely rotatable. The rollers 13.1 of the thread guides of the first group are assigned to the spinning nozzle 3 in order to converge the filament strands of the respective threads at a so-called convergence point. In this connection, the rollers 13.1 are held in a row at a spinning distance from one another on a roller carrier 31. In principle, these rollers 13.1 can also be held on a single roller carrier.

Below the first set of thread guides 13 there is a second set of thread guides 14, which comprises a plurality of rollers 14.1. The rollers 14.1 of the second group of thread guides 14 are arranged one above the other in a staggered manner, i.e. an inverted V-shaped tandem arrangement occurs. In this case, the rollers 14.1 are held on a V-shaped carrier 15 which is arranged in the central region of the row of spinning nozzles 3, and the second group of thread guides 14 is associated with a thread guide device 16 in such a way that the thread can be guided between the rollers 14.1 and the first thread guide 18.1 without deflection.

As shown in particular in fig. 1, the horizontal offset formed between adjacent rollers 14.1 of the second group of thread guides 14 is equal to the thread spacing of adjacent threads. The threads of the thread sheet 30 can thus be fed directly to the godets 18.1,18.2 of the godet unit 16 at a relatively small thread pitch, independently of the diameter of the roller 14.1. The thread pieces are then preferably guided with an inter-thread spacing in the range of 4-8 mm. The rollers 14.1 of the second group of thread guides 14 are oriented with their axes perpendicular to the axes of the godets 18.1, 18.2.

In the embodiment shown in fig. 1 and 2, the number of selected spinning nozzles 3 in the spinning device 1 and the number of winding stations 26 in the winding device 21 are exemplary. The device described here is therefore designed for the production of six threads. In principle, such spinning devices can also produce up to twice as many threads at the same time. The tandem arrangement of the spinning nozzles 3 and the winding station 26 is then maintained such that the winding station 26 extends substantially perpendicularly to the row of spinning nozzles 3.

The function of the device is shown in the views of fig. 1 and 2. In this case, a plurality of filament strands composed of a molten polymer are extruded continuously from each spinning nozzle 3. For this purpose, each of the spinning nozzles 3 is supplied with a partial melt stream of molten polymer under pressure by a spinning pump 4. After the strands of filaments are extruded, they are cooled and strengthened within the cooling well 9. The thread pieces are continuously drawn off by the thread guides 18.1,18.2 of the thread guide device 16. The convergence of the threads from the spinning space of the spinning device to the processing space of the godet device 16 takes place by means of rollers 13.1 of the first group of guides 13 and rollers 14.1 of the second group of guides 14. In this case, a short distance between the guide disc device 16 and the spinning device 1 can be achieved. In particular, the outer threads of the thread sheet 30 can therefore be drawn off from the spinning device 1 at a large deflection angle and subsequently fed to the godet device 16. By means of the degree of deflection of the threads, the distance between the spinning device and the thread guide device can be shortened proportionally.

Within the godet unit 16, the yarn is drawn and swirled to be deformed and then fed to a winding station 26. In the winding station, each thread is wound into a bobbin. Since the threads are deflected essentially without friction on the freely rotatable rollers 13.1,14.1 of the thread deflection device 12, the physical properties of the threads are essentially identical and constant. In this connection, the device according to the invention is particularly suitable for drawing relatively large quantities of threads from the spinning device 1.

Fig. 3 shows an embodiment, in which the spinning nozzles 3 are distributed to two spinning beams 2.1, 2.2. The spinning beams 2.1,2.2 are arranged side by side. The spinning beams 2.1,2.2 are assigned individual spinning pumps 4, which are connected to spinning nozzles 3 held on the respective spinning beam 2.1, 2.2.

A cooling device 7 is provided below the spinning beam 2.1,2.2, respectively, and has two cooling shafts 9.1, 9.2 formed side by side. The cooling shafts 9.1, 9.2 are connected to a blowing device, not shown here, for generating cooling air. In order to draw off the threads produced on the two spinning beams, a godet unit 16 and a winding unit 21 are provided, which in this embodiment are identical to the previous embodiment. For the sake of brevity, reference is made to the preceding description.

The convergence of the thread sheet 30 between the spinning device 1 and the godet device 16 is also achieved by the thread deflection device 12, which is formed by two sets of thread guides 13, 14. In this embodiment, the first group of thread guides 13 is divided into two sub-groups, wherein the first sub-group belongs to the spinning beam 2.1 and the second sub-group belongs to the spinning beam 2.2. The rollers 13.1 of the thread guides 13 of the first group are therefore assigned directly to one of the spinning nozzles 3 on the spinning beam 2.1, 2.2.

The second group of thread guides 14 is held in the central region between the spinning beam 2.1, 2.2. In this embodiment, the second group of thread guides 14 is also formed by freely rotatable rollers 14.1, which are arranged one above the other. For this purpose, one subgroup of rollers 14.1 is held on the first carrier 15.1 and the other subgroup of rollers 14.1 is held on the carrier 15.2. The carriers 15.1,15.2 are held in an inverted V-shaped arrangement on a respective rotary shaft 32.1, 32.2. The carriers 15.1,15.2 can thus be moved between the operating state and the mounted state. Fig. 3 shows an operating state of the carriers 15.1,15.2, in which the roller 14.1 is in the operating position. The carrier 15.1,15.2 is in a mounted state, shown by broken lines, in which the roller 14.1 is held in the mounted position. This embodiment is particularly advantageous for the thread sheet to be pressed against the rollers 13.1,14.1 of the thread deflection device 12 at the beginning of the processing operation.

The function of the embodiment shown in fig. 3 is the same as the embodiment according to fig. 1 and 2. Reference is made to the previous description.

The embodiment shown in fig. 3 is particularly suitable for receiving the threads extruded at adjacent spinning stations together as a thread sheet and for winding them into bobbins by means of a winding device.

Fig. 4 shows schematically a further embodiment of the device according to the invention in a front view. This example consists of a spinning device 1, a preparation device 32, a thread deflection device 12, a godet device 16 and a winding device 21. The spinning device 1, the godet unit 16 and the winding device 21 are designed identically to the embodiment according to fig. 3, so that reference is made here to the previous description and are not described here further to avoid redundancy.

In order to converge the thread strands emerging from the spinning nozzle 3 into threads, a preparation device 32.1,32.2 is provided below the cooling shaft 9.1, 9.2. Each of the illustrated preparation devices 32.1,32.2 has a filler 33 and a collecting thread guide 34 for each thread. In this case, the oiling device 33 and the collecting thread guide 34 each form a convergence point to the spinning nozzle 3 located upstream in order to wet the thread strands and converge them into a thread. The oiler 33 is connected to a fluid source such as a metering pump, either collectively or individually.

Below the preparation device 32 there is a thread deflection device 12 comprising two sets of thread guides 13 and 14. Each group of thread guides 13,14 has a plurality of rollers 13.1,14.1, which are arranged one above the other in such a way that the threads of the thread sheet 30 are guided over the rollers 13.1,14.1 with the same winding angle in the range of 90 °. The threads of the thread sheet 30 are thus guided on the rollers 13.1 of the thread guides 13 of the first group at a wrapping angle in the range of 90 °. The rolls 13.1,14.1 assigned to one of the threads are therefore located at substantially the same working height.

For this purpose, the rollers 14.1 of the second group of thread guides 14 are held in the form of a V-shaped train on the V-shaped carrier 15 in a staggered manner. The roller 13.1 of the first group of thread guides corresponds accordingly to the roller 14.1, wherein the roller 13.1 defines a vertical thread movement plane together with the collecting thread guide 34 which is currently leading in the thread run.

The function of the embodiment of the device according to the invention shown in fig. 4 is the same as the previously described embodiments, so reference is made to the previous description.

The exemplary embodiment of the thread deflection device 12 shown in fig. 1 to 4 represents a possible arrangement of two sets of thread guides for converging the thread disks of a plurality of spinning nozzles with a thread spacing that is as narrow as possible. The rollers are preferably designed to rotate freely. In principle, however, it is also possible for at least one of the sets of rollers to be driven. In this connection, the spinning nozzles of one spinning station or of several adjacent spinning stations can advantageously be rapidly picked up and guided past the godet device at narrow intervals.

Claims

1. An apparatus for melt spinning, drawing off and winding up thread webs, comprising a spinning device (1) having a row of a plurality of spinning nozzles (3), a thread guide device (16) having at least two drivable godets (18.1,18.2), a winding device (21) having a row of a plurality of winding stations (26), and a thread deflection device (12) arranged between the spinning device (1) and the thread guide device (16), wherein the row of winding stations (26) is arranged perpendicularly to the row of spinning nozzles (3), the thread deflection device having a first group of thread guides (13) assigned to the spinning device (1) and a second group of thread guides (14) assigned to the thread guide device (16), wherein the thread guides (13) of the first group are arranged side by side in a horizontal row at a spinning pitch, characterized in that the two groups of thread guides (13), 14) the thread guides of (1) are formed by freely rotatable rollers (13.1,14.1), the rollers (14.1) of the second group of thread guides (14) are arranged in a staggered manner above and/or below each other, and the rollers (14.1) of the second group of thread guides (14) are held on one or two movable carriers (15,15.1,15.2), each of which can be guided between a placement position of the rollers (14.1) and a working position of the rollers (14.1).

2. The device according to claim 1, characterized in that the offset between the rollers (14.1) of the second group of thread guides (14) is equal to the thread spacing of the threads of the thread sheet (30) on the circumference of one of the godet wheels (18.1, 18.2).

3. Device according to claim 1, characterized in that the rollers (14.1) of the second group of thread guides (14) are held in an inverted V-shaped arrangement in a central region below the spinning device (1).

4. The device according to claim 1, characterized in that the axis of the roller (14.1) and the axis of the godet (18.1,18.2) are oriented perpendicular to each other.

5. Device according to claim 1, characterized in that the spinning nozzle (3) of the spinning device (1) is held by two spinning beams (2.1,2.2) arranged side by side and the rollers (14.1) of the second group of thread guides (14) are held between the spinning beams (2.1,2.2) in a central region.

6. Device according to claim 1, characterized in that each carrier element (15.1,15.2) is held at one end on a pivot (32.1,32.2) and can be guided in an angular range up to the horizontal.

7. The device according to any of the claims 3 to 6, characterized in that the godet unit (16) and the winding unit (21) are arranged below the spinning device (1) in a central region, and that the godet unit (16) is held at a front end of the winding unit (21).

8. Device according to claim 7, characterized in that the thread guiding disc device (16) has a thread suction device (19) arranged downstream of the rollers (14.1) of the second group of thread guides (14) in the thread direction.